caco New York San Francisco practical article written by an amateur who has had ex- Without remuneration. obtainable. Weare the original instructors by mail. verience in rubber stamp making. _One iJlustration. Scientific American Supplements referred to may be HUME CORRESPONDENCE SCHOOL,… … Miniature Incandescent Telephone 4, 1132 206 and 12092 Price 10 Troy, N.Y. 149,1150, 1203, 1204, 12 cross section is considerable, and thus the re- bi office, and all newsdealers. sistance is reduced while the area exposed to 4volts. Sample 15c., 8for $1.00 postpaid. The Lamps : oe CONTROL OF…
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